摘要:

A laboratory study was conducted to determine the influence of a 0.05M phosphate buffer on the adsorption of 2,4‐dichlorophenol (2,4‐DCP) and 2,4‐dinitrophenol (2,4‐DNP) from aqueous solution. Kinetic and equilibrium characteristics were studied. In summary, the phosphate buffer exhibited no discernible influence on the rate of adsorption and adsorptive capacity of an undissociated adsorbate. However, the adsorption of the dissociated forms of 2,4‐DCP and 2,4‐DNP at equilibrium exhibited differing characteristics in the presence and absence of a 0.05M phosphate buffer. The amount of adsorption of the dissociated compounds was increased in the presence of the phosphate buffer, in comparison to similar experiments in which the buffer was not present.

ISSN:0360-1226    

DOI:10.1080/10934527609385791

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

A chemical method employing hydrofluoric acid and capable of enriching the polycyclic aromatic hydrocarbons content from a high volume glass fiber filter is described. The method is especially useful for the rapid preparation of samples for GC/MS identification.

ISSN:0360-1226    

DOI:10.1080/10934527609385792

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

Multiple stagingofanaerobic digestion has been investigated as a means of optimizing the bioconversion of solid waste to methane fuel gas. Stage separation was achieved by pH control of the acid production stage. The results obtained from a laboratory‐scale experimental program are promising. The acidogenic stage was operable at 22°C without sacrifice of methane productivity. There was essentially no difference between the gross energy conversion efficiency of the single vs. multiple stage systems. The methane production stage off‐gases were enriched for methane with a partial pressure averaging 0.8. Multiple staging provided greater stability than did the single stage digesters.

ISSN:0360-1226    

DOI:10.1080/10934527609385793

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

A study has been conducted on a selected wetlands portion of the Hackensack Meadowlands estuary during a peak marsh productivity period in order to quantify the extent to which such wetlands may serve to reduce the nitrogen nutrient load of the tidal waters which twice daily flood over its surface. Total export and import to the selected area was measured over a full tidal cycle. A nitrogen uptake of 5.45% is found. In addition, temperature, dissolved oxygen and salinity was also monitored.

ISSN:0360-1226    

DOI:10.1080/10934527609385794

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

It has been demonstrated that zinc ions inhibits population growth ofEuglena gracilis. Experiments were conducted under laboratory conditions to assay the effects of zinc in varying concentrations on the time dependent growth profile ofEuglena gracilis. The technique consists of growing the organisms in media containing zinc for predetermined times, followed by microscopic examination of cell populations. Results may be rapidly obtained within a few hours in the acute and within 1 or at the most 2 weeks in the chronic tests.

ISSN:0360-1226    

DOI:10.1080/10934527609385795

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

G.ymnodinium breve, the Florida red tide organism, was cultured in enriched seawater medium; the toxin was extracted and a hemolytic fraction separated by column chromatography on Sephadex LH‐20–100. The circular dichroism spectra of isolated human erythrocyte membranes incubated with and without the hemolytic toxin were taken. No changes in the membranes due to the toxin were detected, indicating that membrane proteins were not affected. It was shown that the hemolytic toxin was removed from solution by the isolated membranes, indicating that the toxin was binding to the membranes.

ISSN:0360-1226    

DOI:10.1080/10934527609385796

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

Dialkylammonium nitrite salts are used to inhibit corrosion of ferrous metals in various types of packaging. We have shown that these nitrite salts, solutions used in their preparation, and material in which they are packaged may be contaminated with the corresponding nitrosamines. This nitrosamine formation may represent a hazard for people involved in the preparation or use of dialkylammonium salts.

ISSN:0360-1226    

DOI:10.1080/10934527609385797

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor